A solution of $NaOH (mw = 40)$ is prepared by dissolving 20 grams of the base in enough water to make one liter of solution. Calculate the molarity of this solution.

Question

$\begin{array}{1 1} (a)\;0.5\;moles\\(b)\;0.8\;moles \\ (c)\;0.3\;moles \\ (d)\;0.2\;moles \end{array}$